A 1.00 g charcoal sample from an ancient fire has a 14C activity of 11.2 disintegrations/min. A living tree has a 14C activity of 15.3 disintegrations/min per gram. The half-life of 14C is 5730 y. How old is the charcoal sample?

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

A250-n box is at rest on a frictionless horizotal floor. then a person shoves the box with a non-zero force of magnitude p. which statement best describes the relationship betweeen p and the motion of the box after it was shoved? -the box will not move when p< 250n but otherwise will accelerate at a constant rate that is directly proportional to p - the box will begin moving at a speed that is directly proportional to p, then will gradually slow to a halt -the box will move with constant velocity at a speed that is directly proportional to p -box will accelerate across the floor at a constant rate that is directly proportional to p

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2